A Bar chart with errorbars

[No canvas support]

This goes in the documents header: 
<script src="RGraph.common.core.js"></script>
<script src="RGraph.bar.js"></script>
Put this where you want the chart to show up: 
<canvas id="cvs" width="700" height="250">
    [No canvas support]
</canvas>
This is the code that generates the chart: 
<script>
    var bar = new RGraph.Bar({
        id: 'cvs',
        data: [12,18,10,9,6,20,18],
        options: {
            labels: ['Monday','Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday'],
            shadow: false,
            colors: ['red'],
            strokestyle: 'rgba(0,0,0,0)',
            textAccessible: true,
            errorbars: [
                [5,5],
                [2,6],
                [1,2],
                [3,3],
                [7,4, 'blue'],
                null,
                [5,null]
            ],
            //errorbarsLinewidth: 2,
            //errorbarsColor: 'gray',
            //errorbarsCapped: false,
            //errorbarsCappedWidth: 14 // This is the default
        }                
    }).draw();
</script>